US5997702A - Ozone generating system - Google Patents

Ozone generating system Download PDF

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Publication number
US5997702A
US5997702A US09/027,198 US2719898A US5997702A US 5997702 A US5997702 A US 5997702A US 2719898 A US2719898 A US 2719898A US 5997702 A US5997702 A US 5997702A
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United States
Prior art keywords
liquid
tank
separator tank
vapor separator
water
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Expired - Fee Related
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US09/027,198
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English (en)
Inventor
Akihisa Koganezawa
Yukio Akahori
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Take-One Office Ltd
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Core Corp
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Assigned to CORE CORPORATION reassignment CORE CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AKAHORI, YUKIO, KOGANEZAWA, AKIHISA
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Assigned to TAKE-ONE OFFICE, LTD. reassignment TAKE-ONE OFFICE, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CORE CORPORATION
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/13—Ozone

Definitions

  • the invention relates to an ozone generating system of the type utilizing an aqueous electrolyte.
  • U.S. Pat. No. 3,616,355 (1971) teaches an ozone generating system which uses an aqueous media as an electrolytic solution.
  • Japanese Kokai Patent 49-120891 (1974) teaches an ozone generating system in which an electrolytic solution, including an ozone gas component, is drawn through a fan-cooled radiator and supplied to a liquid-vapor separator where the liquid component of the aforesaid solution is returned to the electrolyte tank. More specifically, this system uses an aqueous sulfate solution as the electrolyte and operates in a manner whereby the density of the sulfate solution is maintained at a specific level through the replenishment of water therein.
  • electrolysis inducing electrodes generate significant thermal energy as a result of the large amount of electric power required, thus necessitating a means to prevent overheating of the electrolyte tank.
  • Direct cooling devices have been employed to cool the electrolyte tank, but these devices apply stresses to the tank which can result in adverse affects to the electrolytic reaction conditions and reduced service life of the tank itself. Reduced service life of the tank is highly disadvantageous, because the electrolyte tanks used in ozone generating systems are made from costly materials, such as platinum, titanium, fluorocarbon, etc.
  • the invention provides means of eliminating the aforesaid shortcomings with the purpose of providing accurate and stable generation of ozone in an ozone generating system using an aqueous electrolyte.
  • the invention is an aqueous electrolyte ozone generating system comprised of:
  • a supply port installed to the aforesaid electrolyte tank so as to allow the supply of aqueous electrolyte therein;
  • a fluid supply means for carrying ozone gas containing fluid to the aforesaid liquid-vapor separator tank
  • an inlet and outlet port installed to the aforesaid liquid-vapor separator tank, said inlet port having the purpose of replenishing pure water to compensate for the consumed aqueous component of the electrolytic solution, and said outlet port having the purpose of discharging the gas component;
  • a electrolytic solution transport means capable of carrying the electrolytic solution to the aforesaid supply port of the aforesaid electrolyte tank
  • a heat exchanger wall formed on a lateral side of the aforesaid liquid-vapor separator tank, which incorporates sufficient surface area so as to provide for effective cooling of the amount of liquid media capable of being held within the aforesaid liquid-vapor separator tank, the liquid-vapor separator tank being further formed as a thin structure which allows the heat exchanger wall to be placed in close proximity to an opposing wall surface;
  • control means installed to the aforesaid liquid-vapor separator tank, said control means being capable of providing a cooling function around the aforesaid heat exchanger wall.
  • a temperature control function is provided for the gas-containing fluid in the liquid-vapor separator tank by means of the operation of the aforesaid temperature control means, said temperature control function being executed after the replenishment water has been mixed into the electrolyte.
  • the liquid-vapor separator tank is equipped with a heat exchanger wall which has a large surface area in relation to the capacity of the separator tank.
  • the wide heat exchanger surface enables fast cooling.
  • the thin structure of the liquid-vapor separator tank allows the surface to be placed in close proximity to the opposite wall and provides for a reduction in temperature difference which is due to horizontal position difference.
  • the invention stabilizes the volume, temperature, and density of the electrolytic solution supplied to the electrolyte tank, and thus provides for a more stable and controlled ozone generating capability. Furthermore, as the need for installing a radiator above the liquid-vapor separator tank, as proposed in the aforesaid Japanese Kokai Patent 49-120891, is eliminated, a more compact design is made possible. As a result, the size of the entire ozone generating system can be made smaller and the number of individual components reduced. While it is possible for the electrolyte tank and liquid-vapor separator tank of a conventional electrolytic ozone generating system (capable of producing approximately one gram of ozone per hour) to be made smaller, this attempt at size reduction only creates more dead space around the radiator and lines.
  • FIG. 1 shows a partial cross section, in schematic form, of an embodiment of the invention.
  • FIG. 2 shows the invention in oblique perspective with a portion cutaway.
  • FIG. 3 shows a partial cross sectional schematic representation of an embodiment of the invention differing from that shown in FIG. 1.
  • FIG. 1 shows complete aqueous electrolyte ozone generating system 100 as well as electrolyte tank 12 and liquid vapor separator tank 1.
  • Electrolyte tank 12 hydrogen gas is generated at cathode 10, and an ozone gas is generated at anode 9 as a result of a water electrolysis reaction caused by the application of a DC voltage.
  • Separation film 11 is installed between cathode 10 and anode 9 to prevent mixture of the gasses generated at each electrode and to aid in the application of hydrogen ions to the cathode.
  • Cathode 10 is comprised of platinum, and anode 9 of platinum and lead oxide in order to provide for adequate gas permeability.
  • Separator film 11 is comprised of, for example, perfluorocarbon sulfonic acid which is known in the art.
  • Liquid-vapor separator tank 1 is formed as thinly as possible in one of its width or depth dimensions, but to a size which provides an adequate liquid-vapor separation effect therein.
  • Heat exchanger wall 1a is installed to the side wall of liquid-vapor separator tank 1 as a means of transferring thermal energy from within the separator tank to the outside.
  • Heat exchanger wall 1a is formed with an effectively large surface area, and can be incorporated as a single unit construction with a temperature control device 2 which employs, for example, a Peltier effect element. As shown in FIG. 2, it is further desirable that the thinly formed container comprising liquid-vapor separator tank 1 have upper and lower portions separated by a relatively large distance.
  • the upper portion is equipped with gas outlet port 5 as a means of carrying out ozone containing gas
  • the lower portion is equipped with a thermocouple 7 as a means of accurately measuring the temperature of the media within container 1.
  • temperature adjustment device 8 be installed as a means of controlling the operation of temperature control device 2, the temperature control operation being based on the temperature of the media monitored by temperature measurement device 7 and executed with the purpose of maintaining a desirable temperature within liquid-vapor separator tank 1.
  • the temperature control device 2 incorporate a highly efficient Peltier cooling element combined with a metal plate having the same or approximate surface area as heat exchanger wall 1a.
  • Other factors relating to the ozone generating system's application may also make it desirable to employ a refrigeration chiller device if a strong cooling effect is needed, or else air, water, or other heat exchanging media if cost is a factor.
  • Fluid supply means 3 connects the upper internal area of the anode side chamber of electrolyte tank 12 to the internal area of liquid-vapor separator tank 1 as a means of transporting the gas-containing liquid to liquid-vapor separator tank 1.
  • Fluid return means 6 connects the lower internal area of liquid-vapor separator tank 1 to the lower internal area of the anode side chamber of electrolyte tank 12 as a means of transporting water to the anode side chamber of electrolyte tank 12.
  • Water replenishment means 4 is utilized to replenish the amount of water consumed in the electrolytic reaction to liquid-vapor separator tank 1. The installation of water replenishment means 4 at a point above the normal media level within liquid-vapor separator tank 1 prevents the media from backing up into means 4 and also improves the cooling effect.
  • Certain applications of the ozone generating system may allow water replenishment means 4 to be located below the media level in liquid-vapor separator tank 1 provided it does not approach the vicinity of fluid return means 6 too closely.
  • Fluid supply means 3, return means 6, and water replenishment means 4 may be connected to various pumps, fluid adjustment devices, and other gas and/or fluid control means as the application dictates.
  • the ozone gas generated in electrolyte tank 12, together and in mixture with the fluid in the anode side chamber, is carried to the top part of liquid-vapor separator tank 1 through fluid supply means 3, separated from the water component therein, and discharged through the aforesaid outlet port where it can be supplied to storage means, separation and/or refining means, or to an ozone utilizing device.
  • ozone is a very strong oxidizer
  • ozone exposed surfaces of the aforesaid electrolyte tank, liquid-vapor separator tank, and fluid transport, etc. should be made from or covered by an appropriate oxidation resistant material such as fluorine resin.
  • Ozone produced by an ozone generating system should optimally be managed in uniform densities and amounts, from the point of initial generation to and including its final application, in order to better control its corrosive effects and potential danger to persons and living things. From this point of view it is highly desirable to simultaneously stabilize the reactive environment within the electrolyte tank and the liquid-vapor separating process.
  • Conventional ozone generating systems do not provide means of preventing the adverse effect on reactive conditions caused by temperature fluctuations within the system, fluctuations which are induced by a water replenishment operation conducted to compensate for the water consumed in the electrolytic reaction.
  • the invention offers an ozone generating system in which the water remaining at the top of the liquid-vapor separator tank 1, and the replenishment water added to the top of the separator tank after the liquid-vapor separation process has been completed, flow downward and are cooled in a integrated manner. Because liquid-vapor separator tank 1 is of thin construction with a relatively small width or otherwise with a relatively small thickness, there is a correspondingly small distance between heat exchanger wall 1a and all of the fluid contained within the liquid-vapor separator tank, thus promoting favorable temperature control response characteristics and reduced temperature variations within the separator tank along the horizontal direction.
  • the relatively thin construction of the tank and the efficient cooling characteristics provided by the large surface area of the heat exchanger wall prevent the fluid flowing into the top of the tank from mixing quickly with the fluid flowing out of the bottom, thus maintaining a stable and uniform low temperature condition at the bottom of the tank independent of the high temperature which may exist at the top. This effect will become even more pronounced and advantageous if the separator tank is made longer in its vertical axis.
  • temperature measurement means 7 is preferably installed at the lower part of separator tank 1, and more preferably installed in the vicinity of the inlet to fluid return means 6.
  • aqueous electrolyte ozone generating system 100 provides various advantages which include an integrated, simple, and highly dependable temperature management function and a more compact overall size compared to conventional types, thus allowing the system to be installed in smaller spaces, and to be maintained with less effort.
  • FIG. 3 provides an additional embodiment of the invention, shown as aqueous electrolyte ozone generating system 200, which offers a more compact configuration than ozone generating system 100 discussed previously.
  • the components shown in FIG. 3 are labeled in the 200 series of numerals with the last two digits corresponding to the same component numbers shown in the system in FIG. 1.
  • the characteristics of the components shown in FIG. 1 are also embodied in the corresponding components shown in FIG. 3 unless otherwise noted.
  • an anode chamber having anode 209 is installed to the lower lateral surface of liquid-vapor separator tank 201 opposite to heat exchanger wall 201a.
  • the gas-containing liquid generated in electrolyte tank 212 is supplied to liquid-vapor separator tank 201 directly through supply port 203 which is formed within and through the side or wall of electrolyte tank 212.
  • Return port 206 is formed below the aforesaid supply port 203 so as to allow water to return directly from liquid-vapor separator tank 201 to the anode chamber.
  • FIG. 3 demonstrates, supply port 203 and return port 206 create direct open passageways between the anode chamber and liquid-vapor separator tank 201, thus eliminating fluid supply means 3 and return means 6 which are utilized in the FIG. 1 embodiment.
  • FIG. 3 shows that the components comprising system 200 have been arranged and adjusted in a way which obtains a more compact ozone generating system as compared to the system shown in FIG. 1.
  • System 200 while being smaller than system 100, still operates on the same principles and thus provides the same ozone generating benefits.
  • ozone generating system 200 in spite of its smaller size, and even without the absence of pumps or any other media drive means located in the vicinity of supply port 203 and lower return port 206, is able to realize the desired operation of the invention through the employment of efficient gas generation, up flow, and discharge effects in the anode chamber. As mentioned previously, these benefits are also realized by ozone generating system 100 shown in FIG. 1.

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Degasification And Air Bubble Elimination (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)
US09/027,198 1997-02-21 1998-02-20 Ozone generating system Expired - Fee Related US5997702A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP05416897A JP3405386B2 (ja) 1997-02-21 1997-02-21 温度制御気液分離装置
JP9-054168 1997-02-21

Publications (1)

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US5997702A true US5997702A (en) 1999-12-07

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US (1) US5997702A (de)
EP (1) EP0861926B1 (de)
JP (1) JP3405386B2 (de)
AT (1) ATE217034T1 (de)
DE (1) DE69805129T2 (de)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6287431B1 (en) 1997-03-21 2001-09-11 Lynntech International, Ltd. Integrated ozone generator system
US6383347B1 (en) * 1997-01-03 2002-05-07 Stuart Energy Systems Corporation Electrochemical cell utilizing rigid support members
US20020134674A1 (en) * 2000-06-20 2002-09-26 Andrews Craig C. Electrochemical apparatus with retractable electrode
US6458257B1 (en) * 1999-02-09 2002-10-01 Lynntech International Ltd Microorganism control of point-of-use potable water sources
US6461487B1 (en) 1998-01-05 2002-10-08 Lynntech International Ltd. Generation and delivery device for ozone gas
US6464868B1 (en) 1999-09-14 2002-10-15 Amos Korin Method and system for controlling biofilm
US6551474B1 (en) 1997-03-31 2003-04-22 Lynntech International Ltd. Generation and delivery device for ozone gas and ozone dissolved in water
US6964739B2 (en) 2000-12-12 2005-11-15 Tersano Inc. Device and method for generating and applying ozonated water
US20080181832A1 (en) * 2007-01-30 2008-07-31 Lih-Ren Shiue Pocket-size ozone generator
US20160347629A1 (en) * 2015-05-28 2016-12-01 Advanced Diamond Technologies, Inc. Recycling loop method for preparation of high concentration ozone
US10143763B2 (en) 2016-10-06 2018-12-04 Alfonso Campalans Neutral atmosphere and sanitization storage apparatus, method and system
CN109576732A (zh) * 2019-01-29 2019-04-05 陈木发 制造活性氧o3的产生器
WO2019191576A1 (en) * 2018-03-29 2019-10-03 NorthStar Medical Radioisotopes LLC Ozone water generation system
EP4001464A1 (de) * 2020-11-16 2022-05-25 L'Air Liquide Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Separator für eine elektrolyseanordnung
GB2613128A (en) * 2020-01-17 2023-05-31 Itm Power Trading Ltd Electrochemical cell plant

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005017181A1 (de) 2005-04-13 2006-10-19 Man Roland Druckmaschinen Ag Druckeinheit einer Rollenrotationsdruckmaschine
TWI534300B (zh) * 2014-12-24 2016-05-21 新至冠有限公司 Efficient production of chlorine dioxide electrolysis device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3616355A (en) * 1968-08-05 1971-10-26 Kdi Chloro Guard Corp Method of generating enhanced biocidal activity in the electroylsis of chlorine containing solutions and the resulting solutions
JPS49120891A (de) * 1973-03-22 1974-11-19
US5094734A (en) * 1989-08-03 1992-03-10 Torrado Santiago D Water treatment unit
US5290406A (en) * 1991-06-17 1994-03-01 Permelec Electrode Ltd. Method for producing ozone
DE29718733U1 (de) * 1996-12-19 1997-12-04 Beyer, Wolfgang, 53359 Rheinbach Vorrichtung zur Erzeugung von Sauerstoff bzw. Ozon-Sauerstoffgemisch

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3616355A (en) * 1968-08-05 1971-10-26 Kdi Chloro Guard Corp Method of generating enhanced biocidal activity in the electroylsis of chlorine containing solutions and the resulting solutions
JPS49120891A (de) * 1973-03-22 1974-11-19
US5094734A (en) * 1989-08-03 1992-03-10 Torrado Santiago D Water treatment unit
US5290406A (en) * 1991-06-17 1994-03-01 Permelec Electrode Ltd. Method for producing ozone
DE29718733U1 (de) * 1996-12-19 1997-12-04 Beyer, Wolfgang, 53359 Rheinbach Vorrichtung zur Erzeugung von Sauerstoff bzw. Ozon-Sauerstoffgemisch

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Database WPI, Section Ch, Week 9351, Derwent Publications Ltd., London, GB; AN 93 411553 XP002065279, Anonymous: Controlling temp. of electrolyser electrode e.g. ozoniser using Peltier unit attached to electrode * abstract * & Research Disclosure, vol. 355, No. 003, Emsworth, GB. *
Database WPI, Section Ch, Week 9351, Derwent Publications Ltd., London, GB; AN 93-411553 XP002065279, Anonymous: "Controlling temp. of electrolyser electrode e.g. ozoniser-using Peltier unit attached to electrode" * abstract * & Research Disclosure, vol. 355, No. 003, Emsworth, GB.

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6383347B1 (en) * 1997-01-03 2002-05-07 Stuart Energy Systems Corporation Electrochemical cell utilizing rigid support members
US6287431B1 (en) 1997-03-21 2001-09-11 Lynntech International, Ltd. Integrated ozone generator system
US6712951B2 (en) 1997-03-21 2004-03-30 Lynntech International, Ltd. Integrated ozone generator process
US6551474B1 (en) 1997-03-31 2003-04-22 Lynntech International Ltd. Generation and delivery device for ozone gas and ozone dissolved in water
US6576096B1 (en) 1998-01-05 2003-06-10 Lynntech International, Ltd. Generation and delivery device for ozone gas and ozone dissolved in water
US6746580B2 (en) 1998-01-05 2004-06-08 Lynntech International, Ltd. Generation and delivery device for ozone gas and ozone dissolved in water
US6461487B1 (en) 1998-01-05 2002-10-08 Lynntech International Ltd. Generation and delivery device for ozone gas
US6866806B2 (en) 1999-02-09 2005-03-15 Lynntech International, Ltd. Methods for assembling an electrochemical cell
US6458257B1 (en) * 1999-02-09 2002-10-01 Lynntech International Ltd Microorganism control of point-of-use potable water sources
US6464868B1 (en) 1999-09-14 2002-10-15 Amos Korin Method and system for controlling biofilm
US6773610B2 (en) 1999-09-14 2004-08-10 Amos Korin Method for controlling biofilm
US7449090B2 (en) 2000-06-20 2008-11-11 Lynntech, Inc. Electrochemical apparatus with retractable electrode
US20020134674A1 (en) * 2000-06-20 2002-09-26 Andrews Craig C. Electrochemical apparatus with retractable electrode
US20050058886A1 (en) * 2000-06-20 2005-03-17 Andrews Craig C. Electrochemical apparatus with retractable electrode
US6860976B2 (en) 2000-06-20 2005-03-01 Lynntech International, Ltd. Electrochemical apparatus with retractable electrode
US20090071838A1 (en) * 2000-06-20 2009-03-19 Lynntech, Inc. Electrochemical apparatus with retractable electrode
US6964739B2 (en) 2000-12-12 2005-11-15 Tersano Inc. Device and method for generating and applying ozonated water
US20080181832A1 (en) * 2007-01-30 2008-07-31 Lih-Ren Shiue Pocket-size ozone generator
US20160347629A1 (en) * 2015-05-28 2016-12-01 Advanced Diamond Technologies, Inc. Recycling loop method for preparation of high concentration ozone
US10239772B2 (en) * 2015-05-28 2019-03-26 Advanced Diamond Technologies, Inc. Recycling loop method for preparation of high concentration ozone
US10143763B2 (en) 2016-10-06 2018-12-04 Alfonso Campalans Neutral atmosphere and sanitization storage apparatus, method and system
WO2019191576A1 (en) * 2018-03-29 2019-10-03 NorthStar Medical Radioisotopes LLC Ozone water generation system
US11390541B2 (en) 2018-03-29 2022-07-19 NorthStar Medical Technologies, LLC Ozone water generation system
CN109576732A (zh) * 2019-01-29 2019-04-05 陈木发 制造活性氧o3的产生器
GB2613128A (en) * 2020-01-17 2023-05-31 Itm Power Trading Ltd Electrochemical cell plant
GB2613128B (en) * 2020-01-17 2024-08-21 Itm Power Trading Ltd Electrochemical cell plant
EP4001464A1 (de) * 2020-11-16 2022-05-25 L'Air Liquide Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Separator für eine elektrolyseanordnung

Also Published As

Publication number Publication date
JP3405386B2 (ja) 2003-05-12
JPH10230101A (ja) 1998-09-02
EP0861926A1 (de) 1998-09-02
ATE217034T1 (de) 2002-05-15
EP0861926B1 (de) 2002-05-02
DE69805129D1 (de) 2002-06-06
DE69805129T2 (de) 2003-03-13

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